Surgery – Means and methods for collecting body fluids or waste material – Receptacle attached to or inserted within body to receive...
Patent
1997-03-20
1998-11-24
Clarke, Robert A.
Surgery
Means and methods for collecting body fluids or waste material
Receptacle attached to or inserted within body to receive...
A61F 544
Patent
active
058400737
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a filter arrangement for a collection bag for body exudates, in particular an ostomy bag with a vent, comprising a filter holder fastened to a wall of the bag at the vent and having a through hole forming a passage from the interior of the bag to the surroundings, and a replaceable filter insert designed for positioning in said hole.
DESCRIPTION OF THE PRIOR ART
It is known to design bags for collection or drainage with a vent for decharging gases which are accumulated in the bag during use and which without this precaution would entail a distension of the bag making the bag noticeable under the user's clothing. Especially in cases with ostomates who have been provided with an artificial opening formed surgically in the abdominal wall for connection of the intestinal system with the ostomy bag, the vent is usually equipped with some kind of deodorizing filter in order to avoid odor nuisances when the escaping flatus reaches the surroundings.
Furthermore, it is known to change the filter when it has lost its deodorizing effect or has been clogged such that the bag need not be disposed of due to the shorter life of the filter.
In prior art filter arrangements of the above-mentioned type as known eg. from DK publication no. 162 136, U.S. Pat. No. 4,411,659 and U.S. Pat. No. 4,451,258 a replaceable filter element is arranged in a filter holder. In these designs, the vent is open during the replacement thus permitting the flatus to escape, perhaps together with material collected in the bag if the user is eg. in a lying position. Besides, it will during replacement be necessary to touch the used filter element which must furthermore be disposed of, and the replacement must therefore be carried out in a place where the user may both discard the filter element and subsequently wash his or her hands.
SUMMARY OF THE INVENTION
With this end in view, it is an object of the invention to provide a filter arrangement which makes it easier and more comfortable for the user to replace the filter insert, the user avoiding touching the filter, and where during the replacement, the vent remains closed all the time and at the same time, a good retention of the filter insert is secured when the filter arrangement is in use.
This purpose is fulfilled by a filter arrangement which is characterized in that for position fixing of the filter insert in a use position, the filter holder has means for engagement with corresponding means on the filter insert which engagement means are designed such that upon positioning in the use position, the filter insert is prevented from being withdrawn from the filter holder, and that at the end of the filter holder facing the interior of the bag an elastically resilient clamping member is provided which in the use position forms a sealing around the filter insert but allows this to be pushed from the outside through the hole of the filter holder into the bag.
Thereby is provided a tight and secure fastening of the filter insert in the filter holder and, at the same time, no gases escape during replacement and furthermore, it is possible to place a new insert in the holder without touching the used, perhaps soiled, filter insert. Besides, there is obtained the advantage that the used filter insert is disposed of in connection with emptying the bag.
In a structurally simple embodiment, said engagement means are formed by an inwardly facing shoulder portion in the filter holder and a corresponding outwardly facing shoulder portion on the filter insert, where the filter insert within said shoulder portion has an internal conical end part with inwardly convergent cross section, and where the elastically resilient clamping member of the holder forms a sealing lip around said end part of the insert. By the complementary shape of the engagement means in the filter holder and on the filter insert, respectively, a seal and form locking connection between these components is obtained in the use position, at the same time as it is possible with one
REFERENCES:
patent: 4211224 (1980-07-01), Kubach et al.
patent: 4411659 (1983-10-01), Jensen et al.
patent: 4451258 (1984-05-01), Jenson
patent: 4512771 (1985-04-01), Norton
patent: 4516974 (1985-05-01), Davis
patent: 4940461 (1990-07-01), Steer
patent: 4986824 (1991-01-01), Steer et al.
patent: 5626569 (1997-05-01), Holtermann et al.
Clarke Robert A.
Coloplast A/S
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